B3311331313231311331322331333132313232233131323132313331323132322132312121   >>    B331133131323131133132233133313231323223313132313231333132313232213231212   <<    B3311331313231311331322331333132313232233131323132313331323132322132312123   >>      B3311331313231311331322331333132313232233131323132313331323132322132312122   >>